Burner.



FREDERIC C. CHADBOBN, 0F NEW'BUEGH, NEW YORK.

BURNER.

Specification of Letters Patent.

Application tiled January 14, 1910. Serial No. 537,988. -I

To all whom 'it may concern:

Be it known that I, FREDERIC C. CHAD- nonN, a citizen of the United States of America, residing at Newburgh, in the county of Orange, State of New York, have invented certain new and useful Improvements in Burners, of which the following is a. specification.

My invention relates to an improved form of burner, especially although not exclusively adapted for burnin gas.

The principal object o the invention is to 'provide a burner which with a minimum consum tion of fuel will burn with an exceedin y hot dame, thus adapting the device or numerousY uses wherein a great amount of heat with a limited use of fuel is essential or desirable.

Another object of the invention is to provide means whereby the entering fuel and air will be thoroughly mixed and agitated prior to its exit at the outlet orifices so that the air and gas mixture may be lighted directly at the outlet orifices, and such means further acting to prevent back fire or back flash of the flame to the fuel outlet.

A further object of the invention is to so construct the burner and arrange and correlate its several parts that it is easily attachable to and detachable from a fuel source thus making it easily portable, that it may be quickly taken apart, cleaned and reassembled, and that it may be located for use in places diiticult of access by reason of the smallness of space available.

A concrete embodiment of the invention is illustratively exemplified in the accompanying drawing wherein- Figure 1v is an elevational view, partly in section, of a water boiler showing my improved form of burner used in connection therewith as a water heater; Fig. 2 is an elevational view of my improved burner; Fig. 3 is a vertical sectional view thereof.

As stated above one of the main objects of the invention is to provide a burner structure consuming com aratively little fuel and producing a very ot flame, and I attain this object by so constructing the burner that the mixture of air and gas, of which the former preferably redominates to a lar e degree, 1s preheate prior to its escape, through the burner holes. The manner of mixing the air and gas and preheating the mixture may be accomplished in several ways, and in the drawm I have Patented May 2, 1911.

shown the means at present pre erred by l me for attaining the result.

Referring first to Figs. 2 and 3, where the burner roper is shown, the numeral 1 designates t e mixing tube which may be of an desired form, that illustrated being cylin rical and open at both ends. The tube 1 is provided preferably with up er and lower external screw threads 2 and 3, the lower threads being adapted to engage an internally threaded sleeve 4, which acts in `the nature of a support for the tube 1 and which sleeve is formed with a lower plate 4 centrally orificed at 4b and having threads which are designed to engage corresponding threads formed exteriorly upon the burner tip 5. The burner tip is sei; into a foot, a pedestal or other support 6 having a fuel passage 6* therein and communicating by means of a tube 7 with a source of fuel supply (not shown). In order to provide for an ample supply of air the sleeve 4 is cut away as shown at 4, leaving only two sup porting webs 4 which are themselves erforated at 4 whereb the reatest osslble quantity of air' is a mitte of the tube 1.

The area of the air admission openings in the sleeve 4 is designedly greater than the (fuel) gas orifice 8 in the burner tip 5, as I have found in practice that the greater the air quantity up to a certain amount, in proportion to the gas quantity, the hotter will be the tiame.

Mounted upon the upper end of the mixing tube 1 is a cap 9 which is internally threadedto engage the threads 2 upon the upper outer surface of the tube 1. This cap is provided with a plurality of series of orlaces 1o and 11, those designated 1o being bored to lead the air and gas mixture diegonally out of the cap 9 and those designated 11 being bored vertically through the head of the cap. The head of the cap 9 is centrally orificed to receive a preheating de vice for the air and gas mixture, this reheating device preferabl consisting o an elongated teat 12, exten ing downwardly a considerabler distance. into the mixing tube 1 and the mixture of air and gas passing upwardly through the tube 1 imp' to the interior ion mges 1 against the heated surface of the tout and' is in this manner preheated prior to its exit through the ignition ports 10 and 11. The upper part of the teat is referably formed as a' dome 12, substantia ly of the form of an inverted truncated cone and serves as a spreader for the fiame. It is to be understood that the teat and dome ma be d1fferently shaped and that their re ative di-Y mensions may be varied but it is of importance that the teat present a considerable surface area in order that the air and gas mixture may be well heated before reaching the openings l0 and 11.

It was above stated that one of the 0bjects of the invention was to provide means for thoroughly mixing the fuel and gas,`

Having thus described my invention what I claim as new and desire to secure by Letters Patent is v 1. In a burner of the character described,

the combination with a casing having its 70 lower portion provided with openings of extended area for the admission of air in considerable quantities and its upper end provided with a plurality of seriesof flame escape orifices, one ofsaid series being bored 75 vertically through said casing and another Y series bored diagonally thro h the casing,

of a preheating device held 1n the casing,

said preheating device comprising a dome projecting upwardly and outwardlg from 80 the casing and formed integrally wit a teat depending a substantial distance into the casing, and meansv for conducting fuel to said casing.

2. In a burner of the character described, `BIS the combination with a casing having its lower portion provided with openings of extended area for the admission of au' in considerable quantities and its u per end mr.. v..

` upon a rod 18 depending from the tent 12. The fan is preferably placed at about the median part of the mixing tube 1 and its function is to thoroughly agitate and mix the air and gas fiowing upwardly in the direction of the orifices l0 and 11. B v emprovided with a series of vertica y bored 90 orifices and a series of diagonall bored orifices, of a preheating device hel in the casing, said preheating device comprisin a v Y dome projecting upwardly and outwa from the casing and formed inte ally wi 95 ploying an agitating device. such for example, as the fan 17. I may if desired, dis

ense with the preheating arrangement 12, but it is to be understood that it is within the scope of my invention to employ both the preheater and the fan in combination. lVhen the gas enters the mixing tube 1 it causes the fan to rotate very rapidly, thereby providing for a thorough admixture of air and gas, and moreover the fan will prevent any back fiash of the flame into the fuel orifice 8.

I have shown in Fig. 1 the application of the invention as a water heater in connection with an ordinary domestic water boiler. The boiler is designated 13 and is mounted upon a support 14 which is provided at its upper portion with a flange 15 designed to support an inclosing jacket 16 for the improved burner. It will be understood that the space within the jacket 16 and immediately under the boiler 13 is very poorly supplied with oxygen and that if a urning candle or fiame were introduced into the space the flame would be extinguished practically immediately. I have found in practice however that by the use of my improved burner, a green intensely hot flame may be maintained in this space as long as the fuel supply is continued and I ascribe this result to the improved form of my burner wherein the air and gas are thoroughly mixed and may or may not be preheated prior to their passage through the orifices 10 and 11. f

a teat depending a substantial distance into the casing, a revoluble air and gas mixer held on said tea-t, and means for conducting fuel to the casing.

3. In a burner of the character described,

the combination with a mixing tube and means for supplying air and gas thereto, said mixing tube having means for the escupe of flame therefrom, of means closely adjacent said flame escape means and d1- 105 rectly in the path of the ame issuing from the mixing tube and adapted to become highly heated by said flame, and means depending in the mixing tube and adapted to receive heat from -said first named means 11' and to act as a preheater for the mixture of nipJ and Y gas passing through the mixing tu e.

4. In a burner of the character described.

the combination with a mixing tube and under the action of flame issuing from the 12 mixing tube, said dome being arranged closely adjacent the said fiame escape means and adapted to have the dames issuing there from impinae directly against the same, and

a teat in the mixing tube adapted to be heated by the dome and adapted also to act as a preheater for he air and gas.

5. In a burner ci the character described, the combination with a mixing tubeand means for supplying air and gas thereto, u?

said mixing tube being provided with flame escape means, of a dome on seid mixing tube, arranged closely ad'acent said ame escae means and directly 1n the path cf the escaping Haine, said dome being in the form of an inverted truncated cone and of a material adapted to become highly heated under the action of flame, and a teat secured to and dependin from the :aid dome into the mixing chamer and being adapted to receive heat from the latter for the purpose of acting as a pveheater for the air and mixture passing throu h said mixing tu In testimony wereoi I have afiixed'my signature in presence of twowitnesses.

FREDERIC C. CHADBORN.l

Witnesses:

um Mmm, -Loms D. Gannon.

(Icpiel o! this patent may be obtained for nve cents each, by addressing the Commiuioner ot Patents, Washington, D. C. 

